Hoop-riveting machine.



Patented June la, |901.

nn. E H S .r W G. ou T.. s .U R P. J 8. 8 5I: 6 7 6 0. N

HO0P RIVETING MACHINE.

(Application filed Oct. 10, 1900,)

4 Sheets-Sheet l.

(No Model.)

No. 676,588. Patentedjune |8,.l90|. J. P. RUST & G. W. FISHER.

HooP mvE'TlNG MACHINE.

(Application filed Oct. 10, 1900.)

4 Sheets-$heef 2.

- .Aim-gays xa'cnonms PETERS ca.. mom-uma.. WASHINGTON. n. r.-

' No. 676,588. Patented .lune I8, 190|.

J. P. RUST & G. W.F|SHER.

HOOP RIVETING MACHINE.

(Applcatinn filed Oct. 10, 1900,)

(No Model.) 4 Sheets-Sheet 3.

Z 4Z Z6' l' a I I fu: naam: wenns co. rnouurwo.. wAsHmcrou, u. c.

Patented lune I8, 190i.

J. P. RUST &. G. W. FISHER.

HooP mvi-:TING MAcHmE. (Application med oct. 1o, 1900;) (No Model) 4 Sheets#Sheet 4.

NrrnD STATES "PATENT OFFICE.

JOIIN P. RUST AND GEORGE W. FISHER, OF KEENE, NEW HAMPSHIRE;

SAID RUST ASSIGNOR TO SAID FISHER.

HOOP-RIVETING MACHINE.

SPEGIFICATON forming part of Letters Patent No.'676,588, dated J' une 18, 1901.

Application lecl October 10, 1900. Serial No. 32,629. (No model-3 T0 f/,ZZ whom, t may concern:

Be it known that we, JOHN P. RUST and GEORGE W. FISHER, citizens of the United States, residing at Keene, in the county of Cheshire and State of New Hampshire, have invented a new and useful Hoop-Ri'veting Machine, of which the following is a specification.

This invention relates to riveting-machines in general, and has specilic reference to machines for riveting hoops and properly forming the hoop adjacent to the rivet after theriveting operation is initiated, it being understood,l1owever,from the following description that the principles involved may be employed in riveting-machines for other specific uses.

One object of the invention is broadly to provide a machine wherein at the will of the operator the rivets will be successively delivered, point up, in advance of the anvil of the machine for engagement with the aliued perfoi-ations at the end portions of a hoop and wherein after such engagement the hoop may be moved rearwardly to position the rivet accurately under the hammer, to be upset thereby.

A further object of the invention is to provide a machine wherein the feed of the rivets from the rivet-box to the horn of the anvil will be accurate and positive, the carrier being of such form as to automatically engage the rivets, an object of the invention being also to insure against dropping of the rivets from the hoop during the movement of the hoop to the hammer by providing a movable table which automatically assumes the proper position to perform this function at the proper time.

An additional object of theV invention is to provide means for guiding the rivet engaged with the hoop into position beneath the hammer and holding the rivet yieldably in such position until after initial engagement by the hammer, and also to provide for gripping the hoop to hold it against movement during the riveting operation and for subsequently forming the hoop at the lap through the medium of this hoop-holding means.

Further objects of the invention relate to the formation of the carrying-belt to hold the rivets securely, while permitting them to be readily withdrawn, and to mount the belt in such manner that the rivet-holding means and the rivets by means of which the holding means are attached will not interfere with the easy running of the belt.

Additional objects and advantages of the invention will be evident from the following description.

In the drawings forming a portion of this specification, and in which like numerals of reference indicate similar parts in the several views, Figure l is a side elevation of the complete machine, the rivet-box being shown in section and containing rivets. Fig. 2 is a top plan view of the machine, the rear portion of the bed-plate being broken away to expose the adjustable mountings of the beltcarrying wheels, the frame of said wheels being shown partly in section. Fig. 3 is avertioal section of the upper portion of the machine, showing the hammer and its operating means and illustrating also the upper portion of the carrying-belt with the movable table in position to receive the hoop and rivet in their passage to the hammer. Fig. 4 is a perspective view of the rocker disassembled. Fig. 5 is a transverse section taken through the hammer-head and the anvil and illustrating in dotted lines the position of the rivet when about to be struck by the hammer. Fig. 6 shows in perspective the hammer and one of the gripping members carried by the rocker. Fig. 7 is a transverse section through the horn of the anvil and showing the tableoperating mechanism, the reciprocatory rod upon which the table is directly supported being shown in elevation. Fig. S is a perspective view showing the table and its supporting-rod, with the wedge-block for raising it. Fig. 9 is a detail perspective view of the Wearplate of the anvil, upon which the rivet is upset. Fig. lO is a detail perspective view showing the adjustable stop-plate which limits the movement of the hoop under the hammer to properly position the rivet. Fig. 1l is a detail elevation showing the lever mechanism, through the medium of which motion is given to the connecting-rod that operates the rivetfeed. Fig. 12 is a perspective view showing the rocker-plate and the pawl thereof, by means IOO of which motion is communicated from the connecting-rod direct to the ratchet upon the feed-pulley of the carrying-belt. Fig. 13 is a sectional view showing a portion of the feedpulley for moving the belt, said section being taken radially of the pulley. Fig. 14 is a side elevation of the feed-pulley of the belt, a portion thereof being shown in section to illustrate the engagement of the pins or sprocketteeth thereof with the belt. Fig. 15 is a partial radial section of one of the idler-pulleys which support the carrying-belt and illustrating the manner in which its periphery is grooved to permit passage of the rivet-holding clips. Fig. 16 is a perspective view showing a portion of a different form of belt, made integral.A Fig. 17 is a perspective View of the attached clip of the two-piece belt.

Referring now to the drawings, the present riveting-machine comprises a bed-plate 20,

which is supported in the present instance f upon legs 2l, which are cast in the manner and form of the legs usually used in this class of machinery.

Upon the bed-plate 20 is fixed a hollow casing 22, the upper portion of which comprises spaced plates 23, which project forwardly beyond the bed-plate and form the horn of the anvil of the machine,l and at the rear end of this horn is formed the solid body portion 24 of the anvil, which body portion acts to connect the plates 23 and form a rigid structure, said plates and body, however, being formed, preferably, integral.

The body portion 24 of the anvil is provided with a transverse dovetail groove 25 therein to removably receive the wear-plate 26 of the anvil., against which the riveting is done, this plate having its base broadened to fit the groove. The upper face of the Wear-plate is arc-shaped, as shown in Fig. 9, to conform to the curvature of the iinished hoop, and centrally thereof is'formed a transverse rectangular slot or groove or recess 27, the depth of this groove being slightly less than the thickness oi a rivet-head, whereby in the riveting operation the head of the rivet will lie in the slot and in such position that they proper curvature of the hoop will not be destroyed at the lap.

In practice the punched and overlapped ends of the hoop are slipped over the horn of the anvil and are brought to engage a rivet with the alined perfor-ations, the rivet having been previously delivered upon the horn of the anvil in an upright position by mechanism to be hereinafter described. The hoop is then moved rearwardly of the anvil and onto the wear-plate 26, with the head ot" the rivet in the-slot 27 and the upper end or point of the rivet in position to be struck by the hammer.

The hammer above mentioned is carried in the head 28 of a rock-lover 29, which is pivotall'yv mounted in the casing 22, the rear end of' this rocker being positioned to bear against an eccentric 30 at its under side and mounted f wardly to operate the hammer.

upon a drive-shaft 31, said shaft having a balance-wheel'32 and a drive-'pulley 33, through the medium of whiehit is rotated from a belt in the usual manner. As this shaft 31 is rotated the eccentric is correspondingly moved, and by throwing the rear end of the rocker upwardly the head thereof is moved down- This hammer is shown at 34 and consists of a simple cylindrical rod, which is slidably mounted in a vertical passage 35 in the head 2S .and is held from dropping from the passage by means of a set-screw 36, engaged with the head and disposed to impinge against the hammer.

The lower end of the hammer, which is ta-, pered, as shown, projects below the head 28,

and the degree of'this projection is adjusted l by a screw 37, which has threaded engagement with the upper portion of the passage 35 and has its lower end disposed against the upper end of the hammer. When the setscrewr 36 is loosened, this screw 37 maybe. ad-

justed to feed the hammer downwardly or to permit it to be raised, said screw 37 when in contact with the hammer preventing upward movement thereof and receiving the pressure thereof during the riveting operation.

Secured upon or formed integral 'with the head 28, as preferred,is a block 38, havinga passage which alines with and `forms a continuation of the passage 35, said screw 37 passing upwardly through this passage of the block and having a jam-nut 39 for contact with the block to hold the screw from loosening. The block 3S hasY laterally-projecting flanges 40, which are spaced above the upper face of thehead 2S and are separated therefrom by interspaces 41,`the body portion of the block being contracted transversely to form these flanges and the side faces of the head having grooves 42 formed vertically therein and disposed mutually opposite, said passages or grooves 42 leading to the interspaces 41. Face-plates 43 are provided, which are adapted to cover the grooves 42, to form guideways for holding clamps comprising cross-sectionally-rectangular rods or bars 44, which are slidably mounted therein. These bars 44 have their upper ends turned laterally to limitthe downward movement of the bars, and at their lower ends are formed clamping-feet 45, these feet and ends being turned inwardly, as illustrated in Fig. 5 of the drawings. The upward movements of the clamping-bars are limited by the flanges 40, and to hold them yieldably against this upward movement spring plates 46 are clamped upon the rocker and have their forward ends disposed against the upper ends of the bars. As shown in Fig. 5 of the drawings, these clamping or holding bars are positioned at opposite sides of the transverse groove at the uppermost portion of the Wearplate, so that as the head of the rocker dethe head of the rocker has lost motion with IOO IIO

respect to the bars, and when the upper ends of the bars strike the anges 40 the bars will be depressed and will act to bend the hoop to conform to the curvature of the anvil wearplate.

To hold the hoop,with the rivet, against lateral displacement and to guide it to the proper position beneath the hammer, spring-plates 46 are secured to the sides of the casing 22 and have their forward ends taken upwardly to a level with the upper face of the wear block or plate, where they are bent to project forwardly and divergingly, theinner faces of these forwardly-projecting portions 47 being converged downwardly to correspond 'to the taper of the lower end of the hammer. A stop-plate 48 is secured adj ustably to the upper face of the body portion 24 of the anvil, this plate having a longitudinal slot 49 therein, through which is passed a set-screw 50 for clamping the plate to the portion 24. The front end of the stopplate has a recess 5l to receive the lower end of the ham m'er, while permitting the edge at the sides ofthe recess to be projected suiiiciently far to act as a stop for the hoop. Thus the hoop after engagement of the rivet therewith maybe moved rearwardly, taking the projecting upper end of the rivet between the ends of the spring guide-plates, until the hoop strikes the stop-plate, said stopplate being positioned to stop the hoop with the rivet in the direct path of movement of the hammer in its descent. It will be noted that the clamping-rods have their feet 45 below the lower end of the hammer, so that prior to the engagement of the hammer with the rivet the feet strike upon the hoop and are held in such engagement by the springs 46. Thus as the head of the rocker descends these feet 45 first engage the hoop, but do not stop the movement of the hammer, the spring 46 being not of sufficient strength to cause the rods to bend the hoop. The hammer then engages ihe upper end of the rivet and begins the upsetting operation, and when this. upsetting op'eration is partially completed the lost motion of the rocker-head with respect to the clamping-bars is at an end, the springs '46 striking against the iianges 40, when further downward movement of the rocker-head carries the clamping-bars downwardly, bending the hoop to the curvature of the Wearplate of the anvil. Adjustable stop-screws 52 are engaged with the iianges 40 for engagement by the springs 46, and thus by adjustment of these screws the degree of lostimotion of the rocker with respect to the hammer may be varied and the degree of curvature given the hoop may be varied to correspond to the different-sized hoops and the corresponding wear-plate, it being understood that different plates may be used for diierent hoops. lVlien the head of the rocker has reached the limit of its downward movement, the rivet has been upset and the hoop formed, the clamping-bars having also the function of iiattening down the burs at the ends of the hoop formed in the cutting of the metal, these burred portions being pressed against the' Wear-plate. It will be understood that the .rocker is in constant motion, the unriveted hoop being slipped into place and then withdrawn after the rivet has been upset.

To supply the rivets in the proper position at t-he upper face of the horn of the anvil, a carrying-belt is provided and which draws its supply from a rivet-box 60, the belt beingindicated at 6l. The rivet-box is secured to the legs 2l of the machine and comprises a crosssect-ionally-rectangular receptacle 62, the top and rear end of which are open, the base 63 of the box being slanted upwardly and rearwardly, so that the rivets therein will tend to collect in the forward end of the box. In the rear end of the box and directly adjacent to the bottom thereof is disposed the carryingbelt, while the front of the box, which is removable, terminates slightly above the bottom to form an en tering slot 65 for the carrying-belt 61, which is passed inwardly through the slot 65 and along the bottom of the box and out through the open back. .The carrying-belt is mounted upon pulleys, of which one pulley 66 is rotatably mounted in advance of and below the box and with the bottom of the box substantially tangent thereto at the upper edge of the pulley, so that the belt in passing from this pulley may move into the box through the slotted front thereof. From the rivet-box the carrying-belt passes upwardly and rearwardly in the same direction as through 'the rivet-box and around an idlerpulley 67, having an axle or spindle 68,Whicl1 is slidably mounted in a slot in the lateral extension 69 of one of the legs 2l, said spindle having a reduced portion which is mounted in the slot and provided with a terminal nut, whereby the shoulder at the inner end of the reduced portion may be clamped against the said extension. From the pulley 67 the belt 6l is taken upwardly and forwardly and around an idler 70, which is rotatably mounted in the hollow horn of the anvil, this pulley 70 being positioned t'o cause the belt at one point to lie flush with the upper face of the anvil-horn, so that its clips 72, hereinafter more specifically described, will be successively projected above the horn. From the pulley 70 the belt is taken rearwardly and downwardly and around a drive-pulley 73, which is loosely mounted upon a spindle 74, the reduced end of which is slidably mounted also in the slot of the extension 69 and is adapted to be clamped at different points of its movement therein. From the pulley 73 the beltreturns to the pulley 66. To support the belt between the pulleys 67 and 70, an idler 75 may be employed, mounted in the lower portion of the hollow horn of the anvil. As shown in the drawings, the belt consists of an endless strap of steel or other metal, having the clips 72 riveted thereto at regular intervals, each of these clips comprising a head portion 76, a foot portion 77, and a IOS) IIO

stern 78, connecting the head and the foot, the stem lying at nearly a right angle to the head and foot. The free end of the head,

which is disposed in the direction of move,

.notch in the forward end of the head of the clip, and the rear end of the rivet-box is slotted to permit the stem of the rivet to pass therethrough. The rivets engaged with the belt-clips are carried upwardly and over the pulley 70, the belt being given an intermittent motion, so that when the rivet reaches aposition upon the upper face of the horn of the anvil it will stop and may bev engaged with the lapped ends of the hoop to be riveted, in the manner hereinafter described.

It will be noted upon reference to Fig. l of the drawings that the clip side of the belt engages the pulleys 67 and 75, and, as shown iny Fig. l5, the peripheries of these pulleys are channeled at the centers of their concavities to receive the clips, the ianges 8l of the pulleys'preventing lateral displacement of the belt therefrom. The pulleys 66, 70, and 73 receive the side of the belt on which are the heads of the rivets that hold the clips to the belt, and these pulleys have channels 82 in their peripheries of lesser depth.

Inrorder to give intermittent motion to the drive-pulley 73 and therethrough to the belt 6l, a rocker 83 is pivoted upon the spindle of the pulley 73, and this rocker has a pawl 84: pivoted thereon and adapted for engagement with a vratchet 85, fixed upon the Aend of the pulley, whereby when 4the rocker #plate is moved in one direction "the pulley will be rotated, while the return movement will be free from the pulley. To rock the plate 83, a reciprocatory rod 86 is slidably mounted in a hanger 88, depending from the casing 22, the rear end thereof being formed of two telescopic members, as shown, the rear member 87' being pivoted to the rocker-plate. Thetelescopic connection is held adj ustably against movement by means of a set-screw 88 in the member 87 and adapted for engagement with the second member of the rod, which is inserted in a socket' in the member 87. The rod 86 is held normally in its retracted position by means of a helical spring 89, which encircles it and bears at one end against the hanger 88 and at the opposite end against an adjustable collar 90 upon the rod, said collar permitting adjustment of the spring to the proper tension. To move the rod 86 against the tendency of its spring to operate the ratchet-wheel, and thereby move the belt, a

right-angled lever 91 is pivoted to the hanger 87, and one end thereof is disposed against the rod, while the opposite end projects outwardly and is connected by means of a connecting-rod 91' with a knee-lever 92, which is also 'fulcrumed upon the hanger. The kneelever has a knee-pad'93 thereon disposed for engagement by the side of the knee of the operator, and when this pad is pressed laterally the angular lever is moved to press the rod 86 and cause it to act-nate the rockerplate. helical spring returns it and-the rocker-plate to their normal positions.

As hereinbefore intimated, the rivets are engaged with the hoops, while the rivets are yet in engagement with the clips, the rivets being moved from the clips when the hoops are moved rearwardly to the wear-plate ofthe anvil. .In this movement of the rivet fromthe clip there is a liability of the rivet dropping from the hoop, for the reason vthat the belt takes downwardly into the slot of the horn of the anvil and there is nothing to support the head of the rivet and hold it up into place. This slot must, however, be left open during the movement of the belt to permit the clips to pass downwardly and rearwardly in the Inanner above described. It is therefore essential that some meansin the form of a table be pro vided, which when the belt is motionless, as when a rivet is projected above the an vil-horn for engagement with a hoop, will close the slot in the 'horn or cover it and will rea-ch from the surface of the belt to the body 24 of the anvil and which when the belt starts to move will rise and permit the clip which has last presented a rivet vto pass under the table and dow-n through the slot. This table referred to consists of a plate 95, which is adapted to lie at times Ain a recess in the upper faces of the side walls of the slot of the anvil-horn and flush with said upper faces, the front edge of the plate, which is beveled on its under side, lying upon the slanting belt, while the rear edge of the plate lies against the front side of the bod y 24 of the anvil. When in this position, the table forms a continuous surface which receives the head of the rivet while being moved with the hoop to the wearplate of the anvil andholds the rivet in place. When the belt is moved to bring up another rivet, however, the table must be raised, and for this purpose the plate 95 is mounted upon the upper end of a rod 96, which is slidably mounted in a vertical recess or passage in the inner face of the slotted horn of the anvil, this passage or slot being shown at 97 and having a partition 98 nea-r its upper end, through which is formed a perforation 99,

which the rod 96 snugly and slidably fits, said' perforation being of less diameter than the slot 97, and upon the rod, below the partit-ion 98, is' disposed a vhelical'spring 100, which bears at its upper end against the partition and at its lower end against a nut 101, en-

W'hen the knee-pad is released, the' IOO IIO

gaged with the rod, the nut 101 being held against displacement by a jam-nut 102.

Upon the outer face of the anvil-horn is secured a plate 103, which depends therebelow, and on the inner face of this depending portion is formed a race 105, having balls 106 therein, and in the upper portion of the race, which forms a guide, and upon the balls is disposed a wedge-block 107, which when moved in one direction actsto raise the rod 96 and therewith the table and when moved in the opposite direction permits the rod and table to be lowered under the influence of the helical spring 100. To reciprocate the wedgeblock, an arm 108 is connected with the rear end or stem 109 thereof by passing this stem through a perforation in the upper end of the arm, the stern being threaded for engagement of nuts 110, which act to adjust and hold the arm in adjusted position. The lower end of the arm is provided with a sleeve 111, which is disposed upon the rod 86 and is held against movement by a set-screw 112. Thus when the rod 86 is pressed rearwardly to actuate the drive-pulley 73 and feed the belt the wedgev of the wedge-block is slid under the lower end of the rod 96 and raises the rod to raise the table. Vhen the rod 86 is released and returns under the influence of its retracting helical spring, the wedge moves from under the rod 96, when its spring 100 acts to draw it downwardly and seat the table in its operative position. Thus it will be seen that if the knee-lever be actuated to bring a rivet to the top of the anvil the table will at the same time be raised to permit the preceding rivetholding clip to pass down from the face of the anvil-horn, and as soon as the lever is released the table drops to the position to cover the slot of the horn and'present a smooth surface over which the hoop may be moved after engagement of the rivet therewith to prevent the rivet from dropping from place.

As above intimated, the hammer is in constant operation-,while the rivets are presented by the action of the operator, so that the rivets may be fed up at will and may be then moved with' the hoop to the hammer.

In Fig. 16 of the drawings there is shown a modification of the carrying-belt wherein the clips instead of being attached to the belt are formed integral therewith by punching or striking up of the metal thereof at intervals;

The clips themselves have heads 115 and stems 116 of the same form and arrangement as in the previous instance; but the foot of the clip is formed by the metal of the belt.

As shown in Fig. l of the drawings, a steelwire brush 60 may be disposed at the rear open end of the rivet-box to rest with its bristles lightly against the upper face of the carrying-belt, and thus prevent movement of the loose rivets from the box should any ot them become lodged upon the belt.

l; A carrying-'belt for riveting-'machines having rivet-holding clips at intervals thereand a connecting-stem, the end of the head opposite to the connection of the stem being notched, and the foot being secured upon the face'of the belt, the heads of the several clips being projected in the direction of operative movement of the belt.

3. In a riveting-machine, the combination with the an vil and a rivet-box, of a guide-pulley beyond the box, the anvil being slotted, a guide-pulley in the slot of the anvil, a carrying-belt upon the pulleys and passed through the rivet-box, said belt having clips for engagement with rivets therein, and means for feeding the belt to carry the rivets succes sively to the face of the anvil.

4. In a riveting-machine the combination with an anvil having a slotted horn, and a rivet-box, of a carrying-belt passed through the box and adapted to engage and convey rivets from the box, guide-pulleys for the belt, of which one is disposed in the slotted anvilhorn and is located to project the rivets above the horn, and means for operating the belt.

5. In a riveting-machine, the combination with an anvil, of a rivet-box having an inclined bottom, the ends of the box at opposite ends of the incline having openings, a carrying-belt passed through the openings of the ends and over the inclined bottom and having rivet-holding clips projecting upwardly and away from the bottom to engage and convey rivets, a brush disposed in engagement with the belt at its point of exit from the rivetbox to prevent outward movement of loose rivets from the box, and guide-pulleys for the belt disposed to direct the belt to carry the rivets to the anvil. 6. Arivet-box for riveting-machineshaving an inclined bottom, the end of t-he box at the upper end of the incline being open and the end of the box at the lower end of the incline being removable and spaced from the bottom to permit the passage of a belt into the box,- said box having a brush disposed at the upper end of the incline of the bottom for engagement with said belt to free it of loose rivets. 7. In a riveting-machine, the combination with a slotted anvil and a rivet-box, of a carrying-belt disposed to move through the box and the slot of the anvil to engage and carry rivets from one to the other, a drive-pulley engaged with the belt, a reciprocatory rod operatively connected with the driving-pulley to operate it when moved in one direction, a knee-lever operatively connected with the rod to move it in one direction and a return-sprin g for the rod.

ICG

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8. In a riveting-machine, the cox'nbinationV with anl anvil and a rivet-box, of a carryingbelt disposed to engage and carry rivets from one to the other, a drive-pulley engaged with the belt and provided with a ratchet, a rocker having a paWl for engagement with the ratchet to rotatefthe pulley, a reciprocatory rod connected With the rocker, a lever for moving the f' 1 belt, a ratchet in. operative relation to the E pulley, a reciprocatoryrod for operating the ratchet in one direction, a return-spring upon the rod for returning the ratchet, and a'kneelever for moving the rod against the tendency of the spring.

to move through the slot of the horn and 1 with an anvil and a hammer in operativererod in one direction, and a return-spring for the rod.

9. In a riveting-machine, the combination with an anvil having a slotted horn, a hammer for engagement with the body of the anvil and a rivet-box, ot'- acarrying-belt disposed through the box to engage and' carry rivets to theanvil in advance of the ham mer, and mean s for advancing the belt intermittently to project; thel rivets successively.

10. In a riveting-machine, the combination with an anvil having a slotted portion a hammer inl operative relation to the anvil in the rear of the slot, and a rivet-box, of a belt disposed for movement th rough the box and slot gagel and convey rivets from the box tothe anvil,l am-ovable table adapted to close the slot between thel belt and the hammer, and

meansfor raising the table and advancing the beltsimultaneously.

11..y In airiveting-machine, thecombination with an anvil having a slotted portion, a hammer inoperative relation to the anvil in the rearo-f the slotV and a rivet-box, of a belt provided With rivetholding clips, disposed for movement through the box and the slot oi' the anvil to convey rivets from the former to the latter and to project the rivets above the surface of the anvil, of a table disposed to lie at. times to close the slot between the projected. rivet and the hammer, and means for movingr the table when the belt is operated, to permit the clip to pass under the table I2. In a riveting-machine, the combination with thel slotted anvil and a hammer in operative relation thereto, of a carrying-belt having rivet-holding clips and disposed for movement-through the slot of the anvil and to pro-- jectthe rivets above the anvil, a movable table adapted to lie at times to close the slot between the projected rivet and the hammer,

means for feeding the belt, and connections between said feeding means and the table for moving the latter from the slot when the belt is fed, to permit the clip to pass the table.

13. In a rivetingmachine, the combination with an'anvil` and a hammer in operative relation thereto, of a rivet-carrying belt having clips for holding the rivets, said belt being disposed to project the clips with the rivets successively above the face of the anvil, said anvil having an opening through which the the opening to form a continuous surface between the hammer and theadjacent projected rivet-holding clip, a Wedge-block disposed to raise the table to permit the clips to pass for operating the latter.

14. In a riveting-machine, the combination with an anvil and a rivet-box of a carryingbelt for engaging and carrying the rivets from the'- box to the anvil, a drive-pulley for the 15. In a riveting-machine, lthe combination ilation, ot' means for reciprocating thel hammer, and spring-plates vhaving their inner faces converged downwardly to receive` the correspondingly-formed end of the hammer i and having their faces diverged tortvardly to guide arivetin-toalinement Withthe-hammer.

16. In a riveting-machine, the combination wthan anvil and a reciprocatory hammer, of theanvil, said belt being adapted to en' f oi' spring-plates havingv their inner faces spaced to receive the ham-mer therebetween, and a stop-plate adj u-stably mounted in the rear of the hammer, saidplates being adapted to guide and stopfa rivet in' position beneath the hammer.

17. In a riveting-machine, the combi-nation With an anvil and a reoiprocatory hammer havin gits lower end tapered, of spring-plates disposed to receive arivet therebetween and vguide it into line Withthe hammer, said plates being adapted forv engagement by the hammer to separate them and release the rivet.

18. In a riveting-machine, the combination with an anvil having a slotted horn,-of a carrying-belt adapted to'reeeive and carry rivets, said belt bei-ng disposed for passage through the slot of the horn to convey the rivets to the anvil, and means for suppl-ying rivetsv to the belt.

19. In a riveting-machine, the combination mounted in the rocker for limited movement, said bars projecting normally below the hami merand having meansfor hold-ing them yieldably in projected position.

IOO

IIO

20. Ina riveting-machine, the combination with an anvil of a roe-ker, ahammer mounted in the rocker for engagementwith'the anvil, Land clamping-bars slidably mounted in the rooker and projecting normally in advance of the hammer tostrike the anvil before the ham-mer, means for holding the bars yield- Q ably projected, and adjustable stops forlimj. iting the movement of the bars in therocker. belt passes, a table disposedto lie at times in 21. In a riveting-machine, the combination and to form a stop therefor, a set-screw engaged with the rocker and disposed to impinge the hammer to hold it in place, clamping-bars slidably disposed in the rocker, means for limiting the movement of the bars and springs for holding the bars yieldably projected in advance of the hammer.

22. In a hoop-riveting machine, the coinbination With an anvil having a transverselymounted portion and a recess therein, of a rocker having a hammer disposed for movement With the rocker against the recessed portion of the anvil, to engage a rivet disposed with its head in the recess, and clamping-bars yieldabl y held in the rocker and proj ected beyond the hammer to engage the hoop in advance of the engagement of the rivet by the hammer, said rocker having a degree of lost motion with respect to the bars to start the upset of the rivet and subsequently move the bars to bend the hoop to the curvature of the anvil. y

23. In a riveting-machine, the combination.

with an anvil having a slotted portion, a rivet-carrying belt disposed for movement through the slot-,oi` means for supplying rivets to the belt, and a movable table disposed between the belt -and the striking portion of the anvil and in the slot of the anvil, said table being adapted to open and close the slot, for the purpose set forth. y

24. In a riveting-machine, the combination with an anvil having a striking portion and an adjacent slotted portion, of a rivet-carrying belt disposed to carry rivets through the slotted portion of the anvil and project them thereabove for engagement to be moved to the striking portion' of the anvil.

In testimony that We claim the foregoing as our own We have hereto affixed our signatures in the presence of two Witnesses.

JOHN P. RUST. GEORGE W. FISHER. IVitnesses:

HIRAM BLAKE, JOSEPH MADDEN. 

